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Be aware how your voice works. Have you ever pulled the open end of an air filled balloon tight and the air rushes out at a squeal like pitch, then the more you open the balloon, the quieter and lower the pitch gets. This is a literal representation of your vocal chords.
Vocal Cord and Voice Box Anatomy - Natural Variants. 1  The structure of adult vocal folds differs from the vocal fold structure in newborns. 2  In old age, thinning of the superficial layer of the lamina propria and atrophy of the vocalis muscle occurs, which contributes to the difficulty of speech seen with presbylarynx.